Vanessa Williams reveals high school abortion in memoir

The 49-year-old actress speaks candidly about her decision in new memoir You Have No Idea.

Williams says that she kept the incident from her mother Helen Williams, with whom she wrote the memoir, for many years after getting the abortion during high school.

In an interview with Nightline, Williams said: "Being pregnant is the most frightening thing that happens in your life. I knew in high school that [was] something that I was not prepared to do or fight or struggle with."